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2
Network Planning
R&D
VLAN 1
VLAN 2
Testing
Note: When connecting to a switch that does not support IEEE 802.1Q VLAN tags, use
untagged ports.
Application Notes
1.
Full-duplex operation only applies to point-to-point access (such as when a
switch is attached to a workstation, server or another switch). When the switch
is connected to a hub, both devices must operate in half-duplex mode.
2.
For network applications that require routing between dissimilar network types,
you can attach these switches directly to a multi-protocol router.
3.
As a general rule, the length of fiber optic cable for a single switched link should
not exceed:
• 1000BASE-SX: 550 m (1805 ft) for multimode fiber
• 1000BASE-LX:
• 1000BASE-ZX: 70 km (43.4 miles) for single-mode fiber or 100 km (62.1 miles)
for dispersion shifted single mode fiber
However, power budget constraints must also be considered when calculating the
maximum cable length for your specific environment.
2-4
Tagged
Ports
Untagged Ports
Finance
Marketing
VLAN 3
VLAN 4
Figure 2-4 Making VLAN Connections
10
km
(6.2
miles) for single-mode fiber
Tagged Port
VLAN
unaware
switch
Finance
VLAN 3
VLAN
aware
switch
R&D
Testing
VLAN 1
VLAN 2
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